Pass Boxes – Sterllebuy Solutions and Services LLP

Static Pass Box

A Static Pass Box (also called a Passive Pass Box) is a cleanroom equipment used to transfer materials between areas of different cleanliness levels without allowing personnel movement, thereby minimizing cross-contamination and maintaining the integrity of the cleanroom environment.

It is termed “static” because it does not have internal air circulation or filtration (unlike dynamic pass boxes, which include HEPA filters and fans).

Purpose of a Static Pass Box:

Safely transfer materials (tools, documents, small equipment) between rooms.
Prevent contamination during transfer.
Reduce the number of people entering the cleanroom.
Maintain pressure differentials and cleanliness levels in controlled environments.

Dynamic Pass Box

A Dynamic Pass Box is a self-contained cleanroom transfer chamber designed to safely move materials between two areas of different cleanliness classifications, typically where higher contamination control is required. Unlike static pass boxes, dynamic pass boxes include a motorized airflow system with HEPA filtration, ensuring clean air circulation inside the box during the transfer process.

It’s an essential component in pharmaceutical, biotech, semiconductor, and hospital cleanroom facilities where the risk of cross-contamination must be tightly controlled.

Purpose of a Dynamic Pass Box:

To transfer sterile or sensitive materials between clean and less-clean zones.

To maintain pressure gradients and prevent contamination during transfers.

To support GMP, EU-GMP, and ISO cleanroom compliance.

Static Pass Box

Purpose of a Static Pass Box:

Dynamic Pass Box

Purpose of a Dynamic Pass Box:

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